1 |
#ifndef RXVT_UTIL_H |
2 |
#define RXVT_UTIL_H |
3 |
|
4 |
#include <cstring> |
5 |
|
6 |
extern class byteorder { |
7 |
static unsigned int e; // at least 32 bits |
8 |
public: |
9 |
byteorder (); |
10 |
|
11 |
static bool big_endian () { return e == 0x11223344; }; |
12 |
static bool network () { return e == 0x11223344; }; |
13 |
static bool little_endian () { return e == 0x44332211; }; |
14 |
static bool vax () { return e == 0x44332211; }; |
15 |
} byteorder; |
16 |
|
17 |
template<typename T, typename U> |
18 |
static inline T min (T a, U b) { return a < b ? a : (T)b; } |
19 |
template<typename T, typename U> |
20 |
static inline T max (T a, U b) { return a > b ? a : (T)b; } |
21 |
template<typename T> |
22 |
static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } |
23 |
|
24 |
|
25 |
struct zero_initialized { |
26 |
void *operator new (size_t s); |
27 |
void operator delete (void *p, size_t s); |
28 |
}; |
29 |
|
30 |
/* simplevec taken (and heavily modified), from: |
31 |
* |
32 |
* MICO --- a free CORBA implementation |
33 |
* Copyright (C) 1997-98 Kay Roemer & Arno Puder |
34 |
*/ |
35 |
template<class T> |
36 |
struct simplevec { |
37 |
typedef T* iterator; |
38 |
typedef const T* const_iterator; |
39 |
typedef unsigned long size_type; |
40 |
|
41 |
private: |
42 |
size_type _last, _size; |
43 |
T *_buf; |
44 |
|
45 |
public: |
46 |
const_iterator begin () const |
47 |
{ |
48 |
return &_buf[0]; |
49 |
} |
50 |
iterator begin () |
51 |
{ |
52 |
return &_buf[0]; |
53 |
} |
54 |
const_iterator end () const |
55 |
{ |
56 |
return &_buf[_last]; |
57 |
} |
58 |
iterator end () |
59 |
{ |
60 |
return &_buf[_last]; |
61 |
} |
62 |
size_type capacity () const |
63 |
{ |
64 |
return _size; |
65 |
} |
66 |
size_type size () const |
67 |
{ |
68 |
return _last; |
69 |
} |
70 |
|
71 |
private: |
72 |
static T *alloc (size_type n) |
73 |
{ |
74 |
return (T *)::operator new ((size_t) (n * sizeof (T))); |
75 |
} |
76 |
static void dealloc (T *buf) |
77 |
{ |
78 |
if (buf) |
79 |
::operator delete (buf); |
80 |
} |
81 |
|
82 |
void reserve (iterator where, size_type n) |
83 |
{ |
84 |
if (_last + n <= _size) { |
85 |
memmove (where+n, where, (end ()-where)*sizeof (T)); |
86 |
} else { |
87 |
size_type sz = _last+n; |
88 |
sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
89 |
T *nbuf = alloc (sz); |
90 |
if (_buf) { |
91 |
memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
92 |
memcpy (nbuf + (where-begin ()) + n, where, |
93 |
(end ()-where)*sizeof (T)); |
94 |
dealloc (_buf); |
95 |
} |
96 |
_buf = nbuf; |
97 |
_size = sz; |
98 |
} |
99 |
} |
100 |
|
101 |
public: |
102 |
void reserve (size_type sz) |
103 |
{ |
104 |
if (_size < sz) { |
105 |
sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
106 |
T *nbuf = alloc (sz); |
107 |
if (_buf) { |
108 |
memcpy (nbuf, begin (), size ()*sizeof (T)); |
109 |
dealloc (_buf); |
110 |
} |
111 |
_buf = nbuf; |
112 |
_size = sz; |
113 |
} |
114 |
} |
115 |
simplevec () |
116 |
: _last(0), _size(0), _buf(0) |
117 |
{ |
118 |
} |
119 |
simplevec (size_type n, const T& t = T ()) |
120 |
: _last(0), _size(0), _buf(0) |
121 |
{ |
122 |
insert (begin (), n, t); |
123 |
} |
124 |
simplevec (const_iterator first, const_iterator last) |
125 |
: _last(0), _size(0), _buf(0) |
126 |
{ |
127 |
insert (begin (), first, last); |
128 |
} |
129 |
simplevec (const simplevec<T> &v) |
130 |
: _last(0), _size(0), _buf(0) |
131 |
{ |
132 |
reserve (v._last); |
133 |
memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
134 |
_last = v._last; |
135 |
} |
136 |
simplevec<T> &operator= (const simplevec<T> &v) |
137 |
{ |
138 |
if (this != &v) { |
139 |
_last = 0; |
140 |
reserve (v._last); |
141 |
memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
142 |
_last = v._last; |
143 |
} |
144 |
return *this; |
145 |
} |
146 |
~simplevec () |
147 |
{ |
148 |
dealloc (_buf); |
149 |
} |
150 |
const T &front () const |
151 |
{ |
152 |
//ministl_assert (size () > 0); |
153 |
return _buf[0]; |
154 |
} |
155 |
T &front () |
156 |
{ |
157 |
//ministl_assert (size () > 0); |
158 |
return _buf[0]; |
159 |
} |
160 |
const T &back () const |
161 |
{ |
162 |
//ministl_assert (size () > 0); |
163 |
return _buf[_last-1]; |
164 |
} |
165 |
T &back () |
166 |
{ |
167 |
//ministl_assert (size () > 0); |
168 |
return _buf[_last-1]; |
169 |
} |
170 |
bool empty () const |
171 |
{ |
172 |
return _last == 0; |
173 |
} |
174 |
void clear () |
175 |
{ |
176 |
_last = 0; |
177 |
} |
178 |
void push_back (const T &t) |
179 |
{ |
180 |
reserve (_last+1); |
181 |
*end () = t; |
182 |
++_last; |
183 |
} |
184 |
void push_back (T &t) |
185 |
{ |
186 |
reserve (_last+1); |
187 |
*end () = t; |
188 |
++_last; |
189 |
} |
190 |
void pop_back () |
191 |
{ |
192 |
//ministl_assert (size () > 0); |
193 |
--_last; |
194 |
} |
195 |
const T &operator[] (size_type idx) const |
196 |
{ |
197 |
//ministl_assert (idx < size ()); |
198 |
return _buf[idx]; |
199 |
} |
200 |
T &operator[] (size_type idx) |
201 |
{ |
202 |
//ministl_assert (idx < size ()); |
203 |
return _buf[idx]; |
204 |
} |
205 |
iterator insert (iterator pos, const T &t) |
206 |
{ |
207 |
//ministl_assert (pos <= end ()); |
208 |
long at = pos - begin (); |
209 |
reserve (pos, 1); |
210 |
pos = begin ()+at; |
211 |
*pos = t; |
212 |
++_last; |
213 |
return pos; |
214 |
} |
215 |
iterator insert (iterator pos, const_iterator first, const_iterator last) |
216 |
{ |
217 |
//ministl_assert (pos <= end ()); |
218 |
long n = last - first; |
219 |
long at = pos - begin (); |
220 |
if (n > 0) { |
221 |
reserve (pos, n); |
222 |
pos = begin ()+at; |
223 |
memcpy (pos, first, (last-first)*sizeof (T)); |
224 |
_last += n; |
225 |
} |
226 |
return pos; |
227 |
} |
228 |
iterator insert (iterator pos, size_type n, const T &t) |
229 |
{ |
230 |
//ministl_assert (pos <= end ()); |
231 |
long at = pos - begin (); |
232 |
if (n > 0) { |
233 |
reserve (pos, n); |
234 |
pos = begin ()+at; |
235 |
for (int i = 0; i < n; ++i) |
236 |
pos[i] = t; |
237 |
_last += n; |
238 |
} |
239 |
return pos; |
240 |
} |
241 |
void erase (iterator first, iterator last) |
242 |
{ |
243 |
if (last != first) { |
244 |
memmove (first, last, (end ()-last)*sizeof (T)); |
245 |
_last -= last - first; |
246 |
} |
247 |
} |
248 |
void erase (iterator pos) |
249 |
{ |
250 |
if (pos != end ()) { |
251 |
memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
252 |
--_last; |
253 |
} |
254 |
} |
255 |
void swap (simplevec<T> &t) |
256 |
{ |
257 |
::swap(_last, t._last); |
258 |
::swap(_size, t._size); |
259 |
::swap(_buf, t._buf); |
260 |
} |
261 |
}; |
262 |
|
263 |
template<class T> |
264 |
bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
265 |
{ |
266 |
if (v1.size () != v2.size ()) |
267 |
return false; |
268 |
return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
269 |
} |
270 |
|
271 |
template<class T> |
272 |
bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
273 |
{ |
274 |
unsigned long minlast = min (v1.size (), v2.size ()); |
275 |
for (unsigned long i = 0; i < minlast; ++i) { |
276 |
if (v1[i] < v2[i]) |
277 |
return true; |
278 |
if (v2[i] < v1[i]) |
279 |
return false; |
280 |
} |
281 |
return v1.size () < v2.size (); |
282 |
} |
283 |
|
284 |
|
285 |
template<typename T> |
286 |
struct vector : simplevec<T> |
287 |
{ }; |
288 |
|
289 |
#if 0 |
290 |
template<typename T> |
291 |
struct rxvt_vec : simplevec<void *> { |
292 |
typedef T *iterator; |
293 |
|
294 |
void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
295 |
T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
296 |
void erase (int i) { erase (begin () + i); } |
297 |
void erase (iterator i) { simplevec<void *>::erase ((void **)i); } |
298 |
iterator begin () const { return (iterator)simplevec<void *>::begin (); } |
299 |
iterator end () const { return (iterator)simplevec<void *>::end (); } |
300 |
T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
301 |
const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
302 |
}; |
303 |
#endif |
304 |
|
305 |
template <typename I, typename T> |
306 |
I find (I first, I last, const T& value) |
307 |
{ |
308 |
while (first != last && *first != value) |
309 |
++first; |
310 |
|
311 |
return first; |
312 |
} |
313 |
|
314 |
template<typename T> |
315 |
struct auto_ptr { |
316 |
T *p; |
317 |
|
318 |
auto_ptr () : p (0) { } |
319 |
auto_ptr (T *a) : p (a) { } |
320 |
|
321 |
auto_ptr (auto_ptr<T> &a) |
322 |
{ |
323 |
p = a.p; |
324 |
a.p = 0; |
325 |
} |
326 |
|
327 |
template<typename A> |
328 |
auto_ptr (auto_ptr<A> &a) |
329 |
{ |
330 |
p = a.p; |
331 |
a.p = 0; |
332 |
} |
333 |
|
334 |
~auto_ptr () |
335 |
{ |
336 |
delete p; |
337 |
} |
338 |
|
339 |
// void because it makes sense in our context |
340 |
void operator = (T *a) |
341 |
{ |
342 |
delete p; |
343 |
p = a; |
344 |
} |
345 |
|
346 |
void operator = (auto_ptr &a) |
347 |
{ |
348 |
*this = a.p; |
349 |
a.p = 0; |
350 |
} |
351 |
|
352 |
template<typename A> |
353 |
void operator = (auto_ptr<A> &a) |
354 |
{ |
355 |
*this = a.p; |
356 |
a.p = 0; |
357 |
} |
358 |
|
359 |
operator T * () const { return p; } |
360 |
|
361 |
T *operator -> () const { return p; } |
362 |
T &operator * () const { return *p; } |
363 |
|
364 |
T *get () |
365 |
{ |
366 |
T *r = p; |
367 |
p = 0; |
368 |
return r; |
369 |
} |
370 |
}; |
371 |
|
372 |
typedef auto_ptr<char> auto_str; |
373 |
|
374 |
struct stringvec : simplevec<char *> |
375 |
{ |
376 |
~stringvec () |
377 |
{ |
378 |
for (char **c = begin (); c != end (); c++) |
379 |
delete [] *c; |
380 |
} |
381 |
}; |
382 |
|
383 |
#endif |
384 |
|